查询词典 particles

"Emery cloth must never be used, since particles of emery may become embedded and cause rapid Burning away of the points."

干燥湿的聚合物颗粒并把溶剂回收是在塑料工业中有广泛用途的一种操作。

The results indicated that the emulsoid particles have core-shell structure obviously, its diameters are between 100 to 160nm. The glass-transition temperatures were measured by DSC, the results showed that there are three glass-transition temperatures in ACR.

通过动态光散射粒径分析仪和透射电镜对所合成的乳胶粒粒径及其分布进行了测量，借助于IR、DSC考察了所合成的ACR组成变化及其玻璃化转变温度，并通过透射电镜对所合成的ACR的核壳结构进行了验证。

He outlines how the Higgs field, which is thought to be responsible for endowing matter with mass and thus enabling gravity to act on it, may also be a collective property. Physicists are engaged in the biggest scientific experiment in the history of the world at CERN, the European particle physics laboratory, in an attempt to find the particles associated with this field and thereby confirm its existence.

他认为希格斯场（人们认为希格斯场赋予了物质以质量，从而万有引力可以作用于物质之间）可能也有其它物质相伴，并对验证过程进行了简要描述；物理学家正在CERN的欧洲粒子物理试验室里进行史上最大规模的实验，为的是找到和希格斯场关联的粒子，从而确定希格斯场的存在。

The missing link, he adds,"is whether the sodium in the E-ring particles really came from Enceladus."

而最后，这些固态的钠元素将重新和土卫二的喷发物融合在一起并继续存在于土星E环中。

Enceladus continues to exhale water ice into Saturn orbit, keeping the E ring topped off with tiny particles.

土卫二继续喷发冰粒到土星轨道中，使处于外围的E环充满了微小的微粒。

Results: The positive particles of IL-1β was in the cytosol of myocardial cell and vascular endotheliocyte near to the endocardium.

结果：IL-1β阳性颗粒主要在心内膜下的心肌细胞和血管内皮细胞的胞浆中表达。

This method provides an alterative way to obtain energy spectra of precipitating particles, and may also act as the complement of the lowertimeresolution limitations of satellite energetic particle observations. It is of high value in both academic and applied fields to establish models of space environment disturbance.

该方法开辟了获取沉降粒子能谱特征的一条新途径，可以弥补卫星能量粒子观测数据磁地方时分辨率的不足，对于建立空间环境扰动模式具有重要的学术意义和应用价值。

Energetic Particle and Plasma Spectrometer: Measurements of the acceleration of charged particles at the Venus bow shock, where the solar wind slams in to the atmosphere

高能粒子及离子光谱仪：测量金星弓形激波，也就是太阳风轰击大气的地方，处带电粒子的加速度

The influences of the shock thickness and Alfven waves on the particle acceleration by diffusive shock waves are numerically studied through solving one-dimensional diffusive equation including the second-order Fermi effect. It is shown that the spectral index of the energetic particles strongly depends on the shock thickness. For example, the spectral index increases from 2.1 to 3.7 in the low energy range of 3-10 MeV and from 2.5 to 5.0 in the high energy range of 20-60 MeV as the thickness increases. The spectral index decreases from 4.3 to 3.1 as the particle injection energy increases. The spectral index decreases from 4.0 to 1.8 at the quasi-steady stage with the enhancement of the compression ratio from 2 to 4. The results indicate that under the influence of Alfven waves, the energetic particle spectrum at lower energy becomes flat and the spectral index decreases from 2.5 to 0.6 in the low energy range of 3-10 MeV and from 11.6 to 5.0 in the high energy range of 20-60 MeV. At the same time, the rollover energy reaches 19.6 MeV. The spectral index decreases from 5.8 to 2.9 as the energy density of Alfven waves increase. All these results are basically consistent with the theoretical models, as well as the observations of typical energetic particle events.

通过数值求解包含二阶费米加速的一维扩散方程，探讨在准平行激波条件下激波厚度和级联阿尔芬波对粒子加速的影响，研究粒子分布函数的演化与激波厚度和阿尔芬波强度的内禀关系，计算结果表明：(1)考虑激波厚度时，谱指数明显依赖于激波厚度，随着厚度从0.32增大到2.56，低能端(3-10MeV)谱指数逐渐从2.1增加到3.7，高能端(20-60MeV)谱指数从2.4增大到5.0，能谱逐渐变软；当初始注入粒子动量增大1.3倍，质子能谱指数从4.3减小到3.1，且与零厚度激波加速的谱指数差值缩小；厚度不变时，随着压缩比从2增加到4，准稳态分布时低能端(3-10MeV)粒子能谱指数逐渐从4.0减小到1.8谱变硬；(2)在级联阿尔芬波的影响下，随着时间的增大，粒子在低能处(3-10MeV)的谱指数从2.5减小到0.6高能端(20-60MeV)谱指数从11.6减小到5.0，能谱变硬，拐点能量值从7.5MeV增大到为19.6MeV；随着波的能量密度增大，谱指数从5.8减小到2.9，这表明阿尔芬波强度越大，加速效率越高，通过与激波厚度解析结果和高能粒子事件的观测能谱比较发现两者是一致的，说明数值模拟结果是可靠的。

Energy is injected into space by quasars in the form of fast, nonrelativistic particles.

能量是以快速非相对论性粒子的形式由类星体注入空间的。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。